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ACTIVITY 2: True or False
Read the statements given below. Write T if the statement is true. And if the statement is false, rewrite the statement to make it true.
1. Radiant energy spreads out from its source in all directions.
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2. Electromagnetic radiation includes only visible light waves.
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3. Microwaves are a type of infrared wave.
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4. X rays have more energy than gamma rays.
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5. Radio waves, microwaves and ultraviolet waves all have longer wavelengths than visible light.
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6. Both X rays and gamma rays have higher frequencies than ultraviolet rays.
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7. The Sun radiates both visible energy and invisible energy.
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8. Communicating with satellites is an application of gamma rays.
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9. Hard X-rays comprise the range of the EM spectrum between UV and gamma rays.
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10. X-rays were discovered in 1895 by James Clerk Maxwell.
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11. FM radio broadcasting stands for frequency modulation.
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12. The EM spectrum is generally divided into seven regions, in order of increasing wavelength and decreasing energy and frequency.
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13. Ultraviolet light lies in EM spectrum between visible light and X-rays.
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14. Radio waves have a range of applications, including communications and radar.

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15. Electric and magnetic field vectors are perpendicular to each other and at the same time are perpendicular to the direction of propagation of the wave.
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Sagot :

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